Senior citizens can avail of discounts on jeepney fares by presenting a valid senior citizen ID or card to the driver when boarding. The discount typically ranges from 20% to 50% of the fare, depending on local regulations. It’s important to ensure that the jeepney is registered to provide senior citizen discounts, as not all vehicles may comply. For more details, seniors can check with local transport authorities or refer to the Philippine government's guidelines on senior citizen benefits.